Merge branch 'for-2.6.31' of git://fieldses.org/git/linux-nfsd
[cascardo/linux.git] / drivers / gpu / drm / radeon / radeon_ring.c
1 /*
2  * Copyright 2008 Advanced Micro Devices, Inc.
3  * Copyright 2008 Red Hat Inc.
4  * Copyright 2009 Jerome Glisse.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22  * OTHER DEALINGS IN THE SOFTWARE.
23  *
24  * Authors: Dave Airlie
25  *          Alex Deucher
26  *          Jerome Glisse
27  */
28 #include <linux/seq_file.h>
29 #include "drmP.h"
30 #include "radeon_drm.h"
31 #include "radeon_reg.h"
32 #include "radeon.h"
33 #include "atom.h"
34
35 int radeon_debugfs_ib_init(struct radeon_device *rdev);
36
37 /*
38  * IB.
39  */
40 int radeon_ib_get(struct radeon_device *rdev, struct radeon_ib **ib)
41 {
42         struct radeon_fence *fence;
43         struct radeon_ib *nib;
44         unsigned long i;
45         int r = 0;
46
47         *ib = NULL;
48         r = radeon_fence_create(rdev, &fence);
49         if (r) {
50                 DRM_ERROR("failed to create fence for new IB\n");
51                 return r;
52         }
53         mutex_lock(&rdev->ib_pool.mutex);
54         i = find_first_zero_bit(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
55         if (i < RADEON_IB_POOL_SIZE) {
56                 set_bit(i, rdev->ib_pool.alloc_bm);
57                 rdev->ib_pool.ibs[i].length_dw = 0;
58                 *ib = &rdev->ib_pool.ibs[i];
59                 goto out;
60         }
61         if (list_empty(&rdev->ib_pool.scheduled_ibs)) {
62                 /* we go do nothings here */
63                 DRM_ERROR("all IB allocated none scheduled.\n");
64                 r = -EINVAL;
65                 goto out;
66         }
67         /* get the first ib on the scheduled list */
68         nib = list_entry(rdev->ib_pool.scheduled_ibs.next,
69                          struct radeon_ib, list);
70         if (nib->fence == NULL) {
71                 /* we go do nothings here */
72                 DRM_ERROR("IB %lu scheduled without a fence.\n", nib->idx);
73                 r = -EINVAL;
74                 goto out;
75         }
76         r = radeon_fence_wait(nib->fence, false);
77         if (r) {
78                 DRM_ERROR("radeon: IB(%lu:0x%016lX:%u)\n", nib->idx,
79                           (unsigned long)nib->gpu_addr, nib->length_dw);
80                 DRM_ERROR("radeon: GPU lockup detected, fail to get a IB\n");
81                 goto out;
82         }
83         radeon_fence_unref(&nib->fence);
84         nib->length_dw = 0;
85         list_del(&nib->list);
86         INIT_LIST_HEAD(&nib->list);
87         *ib = nib;
88 out:
89         mutex_unlock(&rdev->ib_pool.mutex);
90         if (r) {
91                 radeon_fence_unref(&fence);
92         } else {
93                 (*ib)->fence = fence;
94         }
95         return r;
96 }
97
98 void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib **ib)
99 {
100         struct radeon_ib *tmp = *ib;
101
102         *ib = NULL;
103         if (tmp == NULL) {
104                 return;
105         }
106         mutex_lock(&rdev->ib_pool.mutex);
107         if (!list_empty(&tmp->list) && !radeon_fence_signaled(tmp->fence)) {
108                 /* IB is scheduled & not signaled don't do anythings */
109                 mutex_unlock(&rdev->ib_pool.mutex);
110                 return;
111         }
112         list_del(&tmp->list);
113         INIT_LIST_HEAD(&tmp->list);
114         if (tmp->fence) {
115                 radeon_fence_unref(&tmp->fence);
116         }
117         tmp->length_dw = 0;
118         clear_bit(tmp->idx, rdev->ib_pool.alloc_bm);
119         mutex_unlock(&rdev->ib_pool.mutex);
120 }
121
122 static void radeon_ib_align(struct radeon_device *rdev, struct radeon_ib *ib)
123 {
124         while ((ib->length_dw & rdev->cp.align_mask)) {
125                 ib->ptr[ib->length_dw++] = PACKET2(0);
126         }
127 }
128
129 static void radeon_ib_cpu_flush(struct radeon_device *rdev,
130                                 struct radeon_ib *ib)
131 {
132         unsigned long tmp;
133         unsigned i;
134
135         /* To force CPU cache flush ugly but seems reliable */
136         for (i = 0; i < ib->length_dw; i += (rdev->cp.align_mask + 1)) {
137                 tmp = readl(&ib->ptr[i]);
138         }
139 }
140
141 int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib)
142 {
143         int r = 0;
144
145         mutex_lock(&rdev->ib_pool.mutex);
146         radeon_ib_align(rdev, ib);
147         radeon_ib_cpu_flush(rdev, ib);
148         if (!ib->length_dw || !rdev->cp.ready) {
149                 /* TODO: Nothings in the ib we should report. */
150                 mutex_unlock(&rdev->ib_pool.mutex);
151                 DRM_ERROR("radeon: couldn't schedule IB(%lu).\n", ib->idx);
152                 return -EINVAL;
153         }
154         /* 64 dwords should be enought for fence too */
155         r = radeon_ring_lock(rdev, 64);
156         if (r) {
157                 DRM_ERROR("radeon: scheduling IB failled (%d).\n", r);
158                 mutex_unlock(&rdev->ib_pool.mutex);
159                 return r;
160         }
161         radeon_ring_write(rdev, PACKET0(RADEON_CP_IB_BASE, 1));
162         radeon_ring_write(rdev, ib->gpu_addr);
163         radeon_ring_write(rdev, ib->length_dw);
164         radeon_fence_emit(rdev, ib->fence);
165         radeon_ring_unlock_commit(rdev);
166         list_add_tail(&ib->list, &rdev->ib_pool.scheduled_ibs);
167         mutex_unlock(&rdev->ib_pool.mutex);
168         return 0;
169 }
170
171 int radeon_ib_pool_init(struct radeon_device *rdev)
172 {
173         void *ptr;
174         uint64_t gpu_addr;
175         int i;
176         int r = 0;
177
178         /* Allocate 1M object buffer */
179         INIT_LIST_HEAD(&rdev->ib_pool.scheduled_ibs);
180         r = radeon_object_create(rdev, NULL,  RADEON_IB_POOL_SIZE*64*1024,
181                                  true, RADEON_GEM_DOMAIN_GTT,
182                                  false, &rdev->ib_pool.robj);
183         if (r) {
184                 DRM_ERROR("radeon: failed to ib pool (%d).\n", r);
185                 return r;
186         }
187         r = radeon_object_pin(rdev->ib_pool.robj, RADEON_GEM_DOMAIN_GTT, &gpu_addr);
188         if (r) {
189                 DRM_ERROR("radeon: failed to pin ib pool (%d).\n", r);
190                 return r;
191         }
192         r = radeon_object_kmap(rdev->ib_pool.robj, &ptr);
193         if (r) {
194                 DRM_ERROR("radeon: failed to map ib poll (%d).\n", r);
195                 return r;
196         }
197         for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
198                 unsigned offset;
199
200                 offset = i * 64 * 1024;
201                 rdev->ib_pool.ibs[i].gpu_addr = gpu_addr + offset;
202                 rdev->ib_pool.ibs[i].ptr = ptr + offset;
203                 rdev->ib_pool.ibs[i].idx = i;
204                 rdev->ib_pool.ibs[i].length_dw = 0;
205                 INIT_LIST_HEAD(&rdev->ib_pool.ibs[i].list);
206         }
207         bitmap_zero(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
208         rdev->ib_pool.ready = true;
209         DRM_INFO("radeon: ib pool ready.\n");
210         if (radeon_debugfs_ib_init(rdev)) {
211                 DRM_ERROR("Failed to register debugfs file for IB !\n");
212         }
213         return r;
214 }
215
216 void radeon_ib_pool_fini(struct radeon_device *rdev)
217 {
218         if (!rdev->ib_pool.ready) {
219                 return;
220         }
221         mutex_lock(&rdev->ib_pool.mutex);
222         bitmap_zero(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
223         if (rdev->ib_pool.robj) {
224                 radeon_object_kunmap(rdev->ib_pool.robj);
225                 radeon_object_unref(&rdev->ib_pool.robj);
226                 rdev->ib_pool.robj = NULL;
227         }
228         mutex_unlock(&rdev->ib_pool.mutex);
229 }
230
231 int radeon_ib_test(struct radeon_device *rdev)
232 {
233         struct radeon_ib *ib;
234         uint32_t scratch;
235         uint32_t tmp = 0;
236         unsigned i;
237         int r;
238
239         r = radeon_scratch_get(rdev, &scratch);
240         if (r) {
241                 DRM_ERROR("radeon: failed to get scratch reg (%d).\n", r);
242                 return r;
243         }
244         WREG32(scratch, 0xCAFEDEAD);
245         r = radeon_ib_get(rdev, &ib);
246         if (r) {
247                 return r;
248         }
249         ib->ptr[0] = PACKET0(scratch, 0);
250         ib->ptr[1] = 0xDEADBEEF;
251         ib->ptr[2] = PACKET2(0);
252         ib->ptr[3] = PACKET2(0);
253         ib->ptr[4] = PACKET2(0);
254         ib->ptr[5] = PACKET2(0);
255         ib->ptr[6] = PACKET2(0);
256         ib->ptr[7] = PACKET2(0);
257         ib->length_dw = 8;
258         r = radeon_ib_schedule(rdev, ib);
259         if (r) {
260                 radeon_scratch_free(rdev, scratch);
261                 radeon_ib_free(rdev, &ib);
262                 return r;
263         }
264         r = radeon_fence_wait(ib->fence, false);
265         if (r) {
266                 return r;
267         }
268         for (i = 0; i < rdev->usec_timeout; i++) {
269                 tmp = RREG32(scratch);
270                 if (tmp == 0xDEADBEEF) {
271                         break;
272                 }
273                 DRM_UDELAY(1);
274         }
275         if (i < rdev->usec_timeout) {
276                 DRM_INFO("ib test succeeded in %u usecs\n", i);
277         } else {
278                 DRM_ERROR("radeon: ib test failed (sracth(0x%04X)=0x%08X)\n",
279                           scratch, tmp);
280                 r = -EINVAL;
281         }
282         radeon_scratch_free(rdev, scratch);
283         radeon_ib_free(rdev, &ib);
284         return r;
285 }
286
287
288 /*
289  * Ring.
290  */
291 void radeon_ring_free_size(struct radeon_device *rdev)
292 {
293         rdev->cp.rptr = RREG32(RADEON_CP_RB_RPTR);
294         /* This works because ring_size is a power of 2 */
295         rdev->cp.ring_free_dw = (rdev->cp.rptr + (rdev->cp.ring_size / 4));
296         rdev->cp.ring_free_dw -= rdev->cp.wptr;
297         rdev->cp.ring_free_dw &= rdev->cp.ptr_mask;
298         if (!rdev->cp.ring_free_dw) {
299                 rdev->cp.ring_free_dw = rdev->cp.ring_size / 4;
300         }
301 }
302
303 int radeon_ring_lock(struct radeon_device *rdev, unsigned ndw)
304 {
305         int r;
306
307         /* Align requested size with padding so unlock_commit can
308          * pad safely */
309         ndw = (ndw + rdev->cp.align_mask) & ~rdev->cp.align_mask;
310         mutex_lock(&rdev->cp.mutex);
311         while (ndw > (rdev->cp.ring_free_dw - 1)) {
312                 radeon_ring_free_size(rdev);
313                 if (ndw < rdev->cp.ring_free_dw) {
314                         break;
315                 }
316                 r = radeon_fence_wait_next(rdev);
317                 if (r) {
318                         mutex_unlock(&rdev->cp.mutex);
319                         return r;
320                 }
321         }
322         rdev->cp.count_dw = ndw;
323         rdev->cp.wptr_old = rdev->cp.wptr;
324         return 0;
325 }
326
327 void radeon_ring_unlock_commit(struct radeon_device *rdev)
328 {
329         unsigned count_dw_pad;
330         unsigned i;
331
332         /* We pad to match fetch size */
333         count_dw_pad = (rdev->cp.align_mask + 1) -
334                        (rdev->cp.wptr & rdev->cp.align_mask);
335         for (i = 0; i < count_dw_pad; i++) {
336                 radeon_ring_write(rdev, PACKET2(0));
337         }
338         DRM_MEMORYBARRIER();
339         WREG32(RADEON_CP_RB_WPTR, rdev->cp.wptr);
340         (void)RREG32(RADEON_CP_RB_WPTR);
341         mutex_unlock(&rdev->cp.mutex);
342 }
343
344 void radeon_ring_unlock_undo(struct radeon_device *rdev)
345 {
346         rdev->cp.wptr = rdev->cp.wptr_old;
347         mutex_unlock(&rdev->cp.mutex);
348 }
349
350 int radeon_ring_test(struct radeon_device *rdev)
351 {
352         uint32_t scratch;
353         uint32_t tmp = 0;
354         unsigned i;
355         int r;
356
357         r = radeon_scratch_get(rdev, &scratch);
358         if (r) {
359                 DRM_ERROR("radeon: cp failed to get scratch reg (%d).\n", r);
360                 return r;
361         }
362         WREG32(scratch, 0xCAFEDEAD);
363         r = radeon_ring_lock(rdev, 2);
364         if (r) {
365                 DRM_ERROR("radeon: cp failed to lock ring (%d).\n", r);
366                 radeon_scratch_free(rdev, scratch);
367                 return r;
368         }
369         radeon_ring_write(rdev, PACKET0(scratch, 0));
370         radeon_ring_write(rdev, 0xDEADBEEF);
371         radeon_ring_unlock_commit(rdev);
372         for (i = 0; i < rdev->usec_timeout; i++) {
373                 tmp = RREG32(scratch);
374                 if (tmp == 0xDEADBEEF) {
375                         break;
376                 }
377                 DRM_UDELAY(1);
378         }
379         if (i < rdev->usec_timeout) {
380                 DRM_INFO("ring test succeeded in %d usecs\n", i);
381         } else {
382                 DRM_ERROR("radeon: ring test failed (sracth(0x%04X)=0x%08X)\n",
383                           scratch, tmp);
384                 r = -EINVAL;
385         }
386         radeon_scratch_free(rdev, scratch);
387         return r;
388 }
389
390 int radeon_ring_init(struct radeon_device *rdev, unsigned ring_size)
391 {
392         int r;
393
394         rdev->cp.ring_size = ring_size;
395         /* Allocate ring buffer */
396         if (rdev->cp.ring_obj == NULL) {
397                 r = radeon_object_create(rdev, NULL, rdev->cp.ring_size,
398                                          true,
399                                          RADEON_GEM_DOMAIN_GTT,
400                                          false,
401                                          &rdev->cp.ring_obj);
402                 if (r) {
403                         DRM_ERROR("radeon: failed to create ring buffer (%d).\n", r);
404                         mutex_unlock(&rdev->cp.mutex);
405                         return r;
406                 }
407                 r = radeon_object_pin(rdev->cp.ring_obj,
408                                       RADEON_GEM_DOMAIN_GTT,
409                                       &rdev->cp.gpu_addr);
410                 if (r) {
411                         DRM_ERROR("radeon: failed to pin ring buffer (%d).\n", r);
412                         mutex_unlock(&rdev->cp.mutex);
413                         return r;
414                 }
415                 r = radeon_object_kmap(rdev->cp.ring_obj,
416                                        (void **)&rdev->cp.ring);
417                 if (r) {
418                         DRM_ERROR("radeon: failed to map ring buffer (%d).\n", r);
419                         mutex_unlock(&rdev->cp.mutex);
420                         return r;
421                 }
422         }
423         rdev->cp.ptr_mask = (rdev->cp.ring_size / 4) - 1;
424         rdev->cp.ring_free_dw = rdev->cp.ring_size / 4;
425         return 0;
426 }
427
428 void radeon_ring_fini(struct radeon_device *rdev)
429 {
430         mutex_lock(&rdev->cp.mutex);
431         if (rdev->cp.ring_obj) {
432                 radeon_object_kunmap(rdev->cp.ring_obj);
433                 radeon_object_unpin(rdev->cp.ring_obj);
434                 radeon_object_unref(&rdev->cp.ring_obj);
435                 rdev->cp.ring = NULL;
436                 rdev->cp.ring_obj = NULL;
437         }
438         mutex_unlock(&rdev->cp.mutex);
439 }
440
441
442 /*
443  * Debugfs info
444  */
445 #if defined(CONFIG_DEBUG_FS)
446 static int radeon_debugfs_ib_info(struct seq_file *m, void *data)
447 {
448         struct drm_info_node *node = (struct drm_info_node *) m->private;
449         struct radeon_ib *ib = node->info_ent->data;
450         unsigned i;
451
452         if (ib == NULL) {
453                 return 0;
454         }
455         seq_printf(m, "IB %04lu\n", ib->idx);
456         seq_printf(m, "IB fence %p\n", ib->fence);
457         seq_printf(m, "IB size %05u dwords\n", ib->length_dw);
458         for (i = 0; i < ib->length_dw; i++) {
459                 seq_printf(m, "[%05u]=0x%08X\n", i, ib->ptr[i]);
460         }
461         return 0;
462 }
463
464 static struct drm_info_list radeon_debugfs_ib_list[RADEON_IB_POOL_SIZE];
465 static char radeon_debugfs_ib_names[RADEON_IB_POOL_SIZE][32];
466 #endif
467
468 int radeon_debugfs_ib_init(struct radeon_device *rdev)
469 {
470 #if defined(CONFIG_DEBUG_FS)
471         unsigned i;
472
473         for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
474                 sprintf(radeon_debugfs_ib_names[i], "radeon_ib_%04u", i);
475                 radeon_debugfs_ib_list[i].name = radeon_debugfs_ib_names[i];
476                 radeon_debugfs_ib_list[i].show = &radeon_debugfs_ib_info;
477                 radeon_debugfs_ib_list[i].driver_features = 0;
478                 radeon_debugfs_ib_list[i].data = &rdev->ib_pool.ibs[i];
479         }
480         return radeon_debugfs_add_files(rdev, radeon_debugfs_ib_list,
481                                         RADEON_IB_POOL_SIZE);
482 #else
483         return 0;
484 #endif
485 }